Friction-gear for draft-riggings.



` 1. F. o'coNNon.

FRICTION GEAR FOR DRAFT RIGGINGS.

APPLICATION FILED MAR. 30| |911.

Patented Jan. 8,1918.`

UNI'rEDs'rATES "P` OFFICE.

soms. oroomcon, or oHICAGo, ILLINoIs, nsslonon 'ro WILLIAM u, Intim, olf oHAzY, New Yonx.

InI'c'rIoNf-GEAB Fon Animm-lancientres.

lTo till` whom it fnay concern; Be it known that 1, Joni: E.`1 OfCo NNon,` e citizen of the United States', .residing at 0h1- '1llinois, have Invented a certain new' und useful I mprovem yDreiit-Riggings,

cnt in Friction-Genre for of whiclrtlie following 1s a full, clear, concise, und exact description,

- reference being had to the accompanying drn\\'ings, forming n piu-t oi this specih cation.

This' invention relatesto improvements in4 friction geni-s iordruft riggings.

i, adapted therefor.

the` lest named elements -views taken 'onthe Fig. 1. And F 1g.-` truting The object of this invention Is to provide a shock absorbing mecl'iniiislnof the fr iction type adnpted for railway cnr. draftrl'g gings and othersiiniler. uses, and wherein so' designed as to give Innximum frictional areas.' -f F Another and 'more'.f'specic object of the invention isy to proidee shock absorber linving n friction eheh, surfaces ofwliich. coperate friction shoes, and in addition, an inner against which other friction elements. bear, and seid' post' hayu ing maximum'contacting friction surfaces;

In seid drawing, FigureA draft rigging showing mJy improvements Fig tion of the shock absorbing mechnnistp or gear proper.

lines. 3--3 and 4`4 of more partculariy the edge ofone of the 'post wings, E

, the. invention is Vshown in combinntion W1tl1` a draw bnr 10, yoke 11,followers` 125712 and 'stops- 1313 of n railway draft rigging.,

anc rear integral Mounted between the a. shock fiibsorbing mechanism ns shown, comprises u casting friction shell. proper 14, spring 'cnsmg .15

followerwit 1in Vthe .casting Af is the main' spring 1 preiernbl consist-ing of. inner sind outer nesiedcoils, the latter bearing at their 4rear endsagninst the casting pro er, and,

face of theshellproper'l-L'are three friction friction post" 5is a. 'detail view illus#V inA. I ope'rnble with thelinnerfendsfoftlio, friction shoes 19 'nre three additional 4coinfbnwr; isf-12 is 1Q'. Mounted specification of :Letters Patent.

` ingly shaped cylindrical outer surfaces;

tengo, in the county-ot` Cook end :tate of snriuces 2() ofthe shoes are three combined Wedges and friction 4shoes 2%-22 Eu'cliwf with the interior isn part elevntion-u lview, part longitudinal ,section of n 2 1s an: end elevxv Figs. 3 .and #it are. sectional A. vying also provi A and latftlieirgforst n :spring` folltnver 18. --Co-` operable 'withtthe interiorcylmdrlcnl sur.

-distille post 26. is

' tent" ribs" 'the rear Not 4only arethe relativerot'etion' with respect toV th -directly against 1t their inner faces, provided with oppositely' disposedweak Patented Jan. s, 191s. innemen' ma umh so, i917. semina. 158,497.

fnces 20 and 2l. Coperatie with *cliewedgeS-i'` j corresponding shoe wedge face 20. Inner faces of each ofthe members 221 fces 'forinedon n three-wing, centrally located friction post Q5. The cross'sectijqn best illustrated in .Figi'f endf es there shown, there friction surfaces n* s An. a

equally spaced and regularly' arranged with respect to the center of said post. The 'post QGhitsii.

centralextension 27 which bears' against the The respond to the portion of n cylinder, as l cheated at 24', find are adapted to copernte with correspondingly formed rictoni'su'r are three of vsii-id' l..

rear end 'of the; casting A to prevent""saili- Vpost .from moving rearwardly, and" Sifan additional Ineens to prevent rearwnrd V Inovement of the post 2G, the casting A is -pio- `vided on its interior with three'equullyidisg 28' having' their outer ends'. 'chal-nit fer-ed or of blunt Wedge shape, as indicated at 29, to fit corresponding recesses ends of the-Wings of'theA 05 26# wings of the post t usfsilg ported, but on account of the sliapeofit engagement between the ribs 248 and the letter nud the post 26 are prevented bined wedges and friction slioesBl-BL each havin o-wedge surface 32 coperableliiyith tion shoe.

ments is transmitted `from the spring-*17 vtherethrou h.

cylinder land w of the centrnlpost; f In order-sto increase thefcnpuctycof gear and facilitate faces .25 of 'the P95* Slightly.

Qf metal?, as.

Winge.'-

appears from the dotted lines indicated at 34-3l in Figs. 2 and 3.

iVith the arrangement above described it is apparent that l obtain a friction area etween the friction shoes 19 and the shell substantially as great as that now obtained in a well known type of friction gear. In addition to this frictional area, I obtain the" frictional area between the members 22 and 31 with the three-winged central post, and on account of the surfaces of the latter being curved as shown, and arranged substantially triangularly, as illustrated in Figs. 2 and 3, this area approaches a maximum, thus giving a friction gearwherein is obtained substantially double the frictional area normally' obtained in friction' gears of a similar type within substantially the same volume occupied by the friction shell and friction elements. Furthermore, by employing the wedge surfaces atv the opposite ends of the I. friction shoes, the angle between the cowith a friction shell having interior fric` tion surfaces, of a friction post within the shell having exterior friction surfaces, fric tion shoes having wedge faces and coperable with said friction surfaces of the shell and post, Aand spring means for resisting relative movement between said shoes and the shell and post. the friction surfaces of the shell and post being non-concentric.

2. In a shock absorber, the ,combination with a friction shell having interior friction surfaces, of a friction post within the shell having exterior friction surfaces, fric. tionV shoes having Wedge faces and coperable with' said friction surfaces of the shell and post, and spring means for resisting relative movement between said shoes and vthe shell and post, the friction surface of the shell Vbeing curved on radii having their centers within the shell andthe friction surfaces of the post being curved on radii having' their centers exterior to the post.

3. In a shock absorber, the combination .griffie-friction shell having interior friction surfaces', of a frictior. 1vost within the shell having -exterior friction surfaces, friction shoes having wedge faces and coperable with said friction surfaces ofthe shell and post, and spring means for resisting relas" i Q.'

-tion surface, of a friction tive movement between said shoes and the shell and post, the friction surface of the shell being cylindrical and the friction surfaces of the post being exteriorly concave.

4. In a shock absorber, the combination with a friction shell having an interior cylindrical friction surface, of a friction post disposed within the shell and having a series of outer concave friction surfaces facing the cylindrical friction surface of the shell, a spring, friction shoes engagingsaid friction surfaces, and means for wedging said shoes into engagement with said surfaces.

5. In a shock absorber, the combination with a friction shell having inter-io'r` friction surfaces, of a friction post within the shell having exterior friction surfaces, friction shoes having wedge faces and coperable with said friction surfaces ofthe shell and post, and spring means for resisting relative movement between said shoes and the shell and post, the surfaces of the post and shell beingr relatively slightly inclined toward each other from the outer to the inner end of the shell.

G. Inl a shock absorber, the combination Witha. friction shell having interior friction surfaces, of a friction post within the shell having exterior friction surfaces, friction shoes havin Wedge faces and coperable with said friction surfaces of the shell and post, and spring means for resisting relative movement between said shoes and the shell and post, -the friction `surfaces of the -post being inclined outwardly in a direction from the outer end of the shell toward the inner end thereof.

7. In a shock'absorber, the combination with a friction shell havingl an interior fricost located within the shell, said post having three substantially radially extending wings, a spring, friction shoes coperable with the exterior surfaces of said post and the'interior sur.-

face of the shell, and means for wedging said shoes into engagement with their respective friction surfaces.} l

8. In a shock absorber, the combination with a friction shell having interior friction surfaces, of a friction post disposed within the shell, said post havin tially radially extending wlngs dividing the Shell into three separate compartments, a plurality of friction shoes having coperating wedge means therebetween in each of said compartments, and-springi means for resisting relative movement between vsaid shoes and-the shell and post. f

9. In a shock absorber. the t'zombination with a friction shell having aA cylindrical interior friction surface, of a` ember located wi't-hin said shell and'tllviding the latter into three similar compartments` each of said compartments having opposed curved surfaces, friction s hoes coperable with each three` substiinof the surfaces in eheh compartment, and

each oif Said shoes having oppositely arranged i wedge faces 0n its interior, a centrally dis# posed friction posi: within the shell and hav-l ing three regularly arranged cylindriculfric- -tion surfaces on its exterior, ariel inner undv outer sets of combined friction shoes and wedges coperable with the first named `friction shoes, said combined friction slioe's andwedges having interior cylindrical surfaces' coperuting with the friction post. Y

In witness`tlmt I claim the forevoing-I have hereunto1 subscribed my name this day of March, 1017.

' Joli-N F. oCoNNoR. 

